The System Power Management (SPM)
parameters can also be configured in this page. Three SPM policies available:
- Assured Capacity - Source port
has a fixed allocated amount of power and able to deliver its max power capacity
independent of the second port's status
- Shared Capacity - Source port has
a dynamically allocated amount of power and able to deliver up to its max power
capacity depending on the remaining available system power that is shared with
the second port.
- Hybrid Mode - An optional power
policy that behaves as a hybrid of the Assured Capacity Policy and Shared
Capacity Policy. It provides the benefit of the Assured Capacity Policy by
initially advertising the Port Max Power when one Sink is connected, while
allowing equal distribution of the total system USB power, similar to the Shared
Capacity Policy, when two Sinks are connected.
For more information regarding SPM,
see the TPS257xx-Q1 System Power Management application note.